/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 1997-2007 Sun Microsystems, Inc.  Portions Copyrighted 2008 Richard Schilling.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
 * [name of copyright owner]"
 *
 * Contributor(s): Richard Schilling (coderroadie@gmail.com)
 *
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.mail.handlers;

import java.io.*;
import java.util.Properties;
import com.cognition.android.activation.datatransfer.DataFlavor;
import com.cognition.android.activation.*;
import javax.mail.*;
import javax.mail.internet.*;

/**
 * @author Christopher Cotton
 */

public class message_rfc822 implements DataContentHandler {

    ActivationDataFlavor ourDataFlavor = new ActivationDataFlavor(javax.mail.Message.class,
            "message/rfc822", "Message");

    /**
     * return the DataFlavors for this <code>DataContentHandler</code>
     * 
     * @return The DataFlavors.
     */
    public DataFlavor[] getTransferDataFlavors() {
        return new DataFlavor[] { ourDataFlavor };
    }

    /**
     * return the Transfer Data of type DataFlavor from InputStream
     * 
     * @param df The DataFlavor.
     * @param ins The InputStream corresponding to the data.
     * @return a Message object
     */
    public Object getTransferData(DataFlavor df, DataSource ds) throws IOException {
        // make sure we can handle this DataFlavor
        if (ourDataFlavor.equals(df))
            return getContent(ds);
        else
            return null;
    }

    /**
     * Return the content.
     */
    public Object getContent(DataSource ds) throws IOException {
        // create a new MimeMessage
        try {
            Session session;
            if (ds instanceof MessageAware) {
                MessageContext mc = ((MessageAware) ds).getMessageContext();
                session = mc.getSession();
            } else {
                // Hopefully a rare case. Also hopefully the application
                // has created a default Session that can just be returned
                // here. If not, the one we create here is better than
                // nothing, but overall not a really good answer.
                session = Session.getDefaultInstance(new Properties(), null);
            }
            return new MimeMessage(session, ds.getInputStream());
        } catch (MessagingException me) {
            throw new IOException("Exception creating MimeMessage in "
                    + "message/rfc822 DataContentHandler: " + me.toString());
        }
    }

    /**
     * construct an object from a byte stream
     * (similar semantically to previous method, we are deciding
     * which one to support)
     */
    public void writeTo(Object obj, String mimeType, OutputStream os) throws IOException {
        // if the object is a message, we know how to write that out
        if (obj instanceof Message) {
            Message m = (Message) obj;
            try {
                m.writeTo(os);
            } catch (MessagingException me) {
                throw new IOException(me.toString());
            }

        } else {
            throw new IOException("unsupported object");
        }
    }
}
